132161921 has 2 divisors, whose sum is σ = 132161922. Its totient is φ = 132161920.

The previous prime is 132161899. The next prime is 132161923. The reversal of 132161921 is 129161231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132135025 + 26896 = 11495^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 132161921 - 2⁶ = 132161857 is a prime.

Together with 132161923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (132161923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66080960 + 66080961.

It is an arithmetic number, because the mean of its divisors is an integer number (66080961).

Almost surely, 2^132161921 is an apocalyptic number.

It is an amenable number.

132161921 is a deficient number, since it is larger than the sum of its proper divisors (1).

132161921 is an equidigital number, since it uses as much as digits as its factorization.

132161921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 132161921 is about 11496.1698404295. The cubic root of 132161921 is about 509.3724448214.

The spelling of 132161921 in words is "one hundred thirty-two million, one hundred sixty-one thousand, nine hundred twenty-one".